Lubricating and filtering system



Feb, 26, 1929. 1,703,335

F.- A. BowER LUBRICATING AND FILTERING SYSTEM Filed June 18f 1925 2 Sheets-Sheet l INVENTOR v VFevexogfffww A Bawe a f. z3 @a '7' Z mf' WMATORNEYS Patente Feb. ze, 1929.

UNITED STATES PATENT oFFicr..

FERDINAND A. RowER, oF ELI'NT, MICHIGAN, AssIGNoR To GENERAL noToRs conroRATIoN, E DETROIT, MICHIGAN, A CORPORATION or DELAWARE.

LUBRCATING AND FILTERING SYSTEM. l

Application led June 18, 1925'. Serial No. 37,968.

The present invention relates to lubrica-v tion systems for internal combustion engines,` particularly engines of automobiles.

Among the objects of vthe invention is to provide means yfor preventing contamination of the oil in such engines by dirt, metal articles, etc. Another object is to provi e a filter for the oil being circulated in the oiling system of such engines.

Still another object is the provision of means whereby the bearings will be supplied with oil ainder all operating conditions, irrespective of the operation of the filter.

The invention is best illustrated and described with reference to the accompanying drawings in which Fig. 1 is a vertical cross section through the engine and filter with parts in elevation,

Fig. 2 is a side elevation of the oil distribution system supplied directly by the pump,

Fig. 3 is a plan view of the parts shown in Fig. 2,

Fig. 4 is a vertical longitudinal section through the double valve on line 4--4 of Fi 3.

lign the drawings, the crank case, usually a casting, is shown at 10. This is provided with the usual housings for the main crank shaft bearings at 11 and has bolted, or otherwise secured, to it.l the cylinders 12 andv to its underside the oil pan 13.

Formed as a part of the crank case and intermediate its length is an oil chamber 15 having an opening 17 in its upper side and provided with a plugged opening 16 in its bottom.

The oil circulation system comprises pump 20 carried Vby a frame 21 secured to the crank case 10 and driven by shaft 22. The pump 20 draws oil from'the lower portion of pan `13 through a screen 23 and delivers it to the l header of a combination valve member 26 shown in section in Fig. 4). In normal operation, the oil then passes out through openying 27 intopipe 28 which is connected thereto and which is at its other end connected to A a flange 29. The latter is secured to a fitting 30 which is in turn secured to the underside 'I' of the oil chamber 15 and projects into the same, as shown in Fig. 1.

l Fitting 30 is provided with a passage 31 in line with pipe 28 which passage vis threaded at its lower end and is somewhat larger above the threaded portion. Fitting v30 is also provided with another passage 32 leading from passage 31 above the threaded portion to the bottom and adapted to register with another pipe as shown.

Secured in the threaded portion of passage 31 is a tube 33 forming a continuation of pi e 28 and extending through chamber 15 and tlie opening 17 to aI point somewhat above the latter. This tube 33 is threaded at its upper end tocooperate with aI member 34 which has a passage 35 continuing the oil inlet tube 28 and 33. Near its upper end member 34 is provided with two shoulders 36 and 37, one above the other'and betweenwhich passage 35 opens to the outsidey of the member. A second tube 40 fits into the upper end of passage 31 in fitting 30 and surrounds tube 33 being spaced therefrom.. This tube extends to a point a little below the upper end of tube 33 and is open at the top.

Extending down through the opening 17 At its top, the filter unit 41 abuts shoulder 37 of member 34 while at the bottom the unit rests upon a felt packing 44closely surroundl ing tube 40 and carried bv a. collar 45 which is supported by a spring 46 surrounding tube 40 and the upper end of fitting 30 and resting upon the floor of chamber 15.

Over the filter unit is a cover dome 49 which seats in opening 17 of the chamber 15 and is held under second shoulder 36 on member 34. This arrangement of filter, chamber tubes and so forth provides a passage 28,- 33, 35 up through and to the top of the lter unit and to the outside thereof into the space between the unit and the cover. This space opens into chamber 15 in which during operation isa body of 'oil comparatively quiescent and forms therefor a settling chamber. Further the arrangement of parts forms inside of the filter unit a. space for oil passing through the filter from outside thereof and from this space oil is led out through pipe 40, fitting 30, passage 32 to a pipe 50.

The pipe 50 leads to a 4-Way connection 51 and oil coming out of the filter will pass ling communication between header and' filter, or, when, after long continued use, lthe filter becomes too much clogged to allow passage of the oil, means mustbe provided whereby oil may be supplied to the bearings l' without having to pass the filter.

Such means, as shown in the drawings, comprisesV a spring pressed valve 6() controlopening 61 which latter leads into pipe 62 which in turn leads to the Ll-way connection 51. 'lhis permits by-passing the filter when the back pressure therethrough'exceeds a predetermined value. Further, under conditions of high pump speed and back pres: sure from the filter, the' oil cannot find a way out through the bearings, and it becomes desirable to relieve the oil pressure in header Q5. This is done by another spring pressed valve 65 controlling opening 66 which allows the oil to spill back into the oil pan.

It will be noted that the two valves and are substantially identical and t-hat the plugs 63 and 661 serving as spring retainers are also identical. It should also be notedv that springs 64: and 67 are identicaland that the tension upon them differs because of the diderence in length of the respective spring housings. rThis difference in pressure required yfor valve opening is important as. under ordinary conditions the valves should both sta-y closed and the oil all pass through the lter. Under other conditions, valve 60 lshould open before valve 65.

rllhe operation of the device is more or less obvious, but one or two points should be noted.

rlhe oil passing inwardly through the filter leaves the dirt etc., upon the outside wall Jlrom which at least some will drop down into chamber 15 from which it may be flushed through plugged opening 16;.

Another point is the spring pressed support for the filter unit. This permits use of felts of somewhatdifferent characteristics. Some elts will compact under use more than others. Some will regain their original volume after cleaning while others will not.

The mounting is intended to take care of such differences.

Other points of novelty and advantage Will readily occur to those skilled in the art.

Claims:

jacent lend of the filter unit and a spring f Y. around said tube and tending to press thecollar and unit.

2. In an oil filtering system, a tubular lter packing .against the endof the 1. In an oil filtering system for internalunit, a fitting serving as a support for saidy y unit having an inlet and an outlet opening, a pipe fitted to said inlet opening, a cover for said unit, means engaging said inlet pipe to retain said cover, and an outlet pipe concentric with said inlet pipe extendinginto said unit .and communicating with said outlet opening.

3. In an oil filtering system for internal Vcombustion engines, the combination with the engine housing having an oil reservoir and a settling chamber, a filter unit having its inlet side communicating with said chamber, a fitting for supporting said lter unit secured in the Wall of said chamber, means for supplying oil `from said reservoir to said chamber, and means extending through said fitting for delivering oil from the outlet side of said filter, said supplying and delivering means being supported by said fitting.

In testimony whereof I ailix my signature.

FERDINAND A. BOW'ER.

CERTIFICATE OF CORRECTION.

Parent No. 1,103,335. Granted February 26, 1929, to

FERDINAND A. BOWER.

lt is hereby certified tha't error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2', strike out linea 57 to 66, comprising claiml, and after line 56, insertk instead the followingas claim 1:-

l.- ln an oil filtering system for internal combustion engines, a tubular filter unit, a fitting serving asa support for said unit provided with an inlet and. an outlet opening and with an enlarged passage communicating with said openings, an inlet pipe fitted to said inlet opening and extending through said passage, a second pipe concentric with said inlet pipe in said passage, the space between said pipes communicating with said outlet opening, said inlet pipe communicating with the outerside of said unit and said second pipe-with the inner side.;

and that the .said LLetters Patent should b the same may conform to the-record of the case in thePatent Office.

Signed and sealed this 9th day of April, A. D. 1929.

M. J. Moore,

(Seal) Acting Commissioner of Patenti.

e read with this correction therein that Giiii'iiii'ii Gir? GiiRiiii-CTiii Pnient i,7ii3,3\35. @rented February 26, i929, to

iiiiRDiNAND A. iiWEii it is ineieisy certified that einer appease in iiie minted speeiiieaiien 0i the ebene nimiiiei'ed paient requiring correction es ieiiews: iisge Z, sii-iiie out lines 57 is d6, eempiising eiaim i, and sites iine 56, insert instead tile ieiiowing as Claim i.:-

i, in en eii iiiteiing sysieni ier internei eeniiinsiinn engines, a tubular iiiier nnii, n iiiiing sewing as n sensori ies said nnii provided Witii an iniet and an euiief opening and with en eniaiged passage communicating wiiin said openings, an iniei pipe iiied in seid inlet opening and extending iinengii said passage, e. seeend eine eeneeiiiiie with seid inlet pipe in seid passage, the space between seid pipes eonimnnieaiing with said eiiiiei epening, said iniei pipe eeininnnieniing wiiii the osier side 0i said unit and said second pipe Wiiii the innein side;

and that the said Leiters Paieni siieuid iie fend with iiiiis eeiieeiien ilieren that the saine niey eenierin te she ieeoid si the ease in iiie iinieni iiiiiee.

Signed and sealed this 9th den oi Aprii, A. D. i929.,

i/i. i. Mense, (Seal) Amine' Ceinniissionei ei Patents. 

